18783242 has 16 divisors (see below), whose sum is σ = 29629800. Its totient is φ = 8917440.

The previous prime is 18783211. The next prime is 18783251. The reversal of 18783242 is 24238781.

It can be written as a sum of positive squares in 4 ways, for example, as 4713241 + 14070001 = 2171^2 + 3751^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 884 + ... + 6192.

Almost surely, 2^18783242 is an apocalyptic number.

18783242 is a deficient number, since it is larger than the sum of its proper divisors (10846558).

18783242 is a wasteful number, since it uses less digits than its factorization.

18783242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5401.

The product of its digits is 21504, while the sum is 35.

The square root of 18783242 is about 4333.9637746525. The cubic root of 18783242 is about 265.8215491436.

The spelling of 18783242 in words is "eighteen million, seven hundred eighty-three thousand, two hundred forty-two".